Valve stem height is most critical on

Valve stem height is most critical on overhead cam engines.

Explanation:

The overhead cam engines are located at the top of the engine, they are cylinder shaped, on which there are several protruding parts, called cams, cams or cams, each with the function of controlling the opening and closing. of a valve. The height of the valve stem is more critical here to ensure proper operation of the equipment.

It is also composed of several supports to ensure its stability during the excessive revs to which it is subjected to engine acceleration.

i think the answer is b.) them maintain their relationships.

hope it